If your TV connects to 2.4GHz Wi-Fi but refuses to see or join your 5GHz network, the problem usually comes down to one of three things: your TV’s Wi-Fi chip only supports 2.4GHz, your router switched to a security protocol your TV cannot handle, or your mesh system is steering the TV to the slower band automatically. I have helped dozens of people troubleshoot this exact issue, and in most cases the fix takes under 10 minutes once you know where to look.
This guide walks you through every possible cause and gives you step-by-step instructions to get your TV onto the faster 5GHz band. Whether you are dealing with a Samsung, LG, Sony, TCL, or Android TV, the troubleshooting process below covers your situation.
Why Your TV Connects to 2.4GHz But Not 5GHz
When a TV 5GHz WiFi connection fails but 2.4GHz works fine, the cause falls into one of four categories. Hardware limitation is the most common reason: many budget and older smart TVs (especially models from 2020 and earlier) only include a 2.4GHz Wi-Fi radio to save on manufacturing costs. Your TV physically cannot see or connect to a 5GHz signal because the hardware does not exist inside it.
Security protocol mismatches are the second most common cause. Modern routers often default to WPA3 or WPA2/WPA3 mixed mode after a firmware update. Many TVs only support WPA2, so when the router switches security modes, the TV can still connect to 2.4GHz but fails on the 5GHz band where stricter security requirements are sometimes enforced.
Router channel selection causes the third category of problems. If your router’s 5GHz band is set to an automatic channel and lands on a DFS channel (channels 52 through 144), some TVs will not detect the network at all. The TV simply does not support DFS frequencies.
The fourth cause is band steering from mesh Wi-Fi systems. Eeros, Google Nest Wi-Fi, and similar mesh products combine 2.4GHz and 5GHz into a single network name and decide which band each device uses. Mesh systems frequently push TVs to 2.4GHz because the TV appears to have a steady signal there, even though 5GHz would deliver faster streaming speeds.
2.4GHz vs 5GHz for TV Streaming
Understanding the difference between these two frequency bands helps you decide whether troubleshooting is even worth your time. The 2.4GHz band travels farther and penetrates walls better, but it tops out at lower speeds and sits in a crowded frequency space shared with Bluetooth devices, microwaves, and your neighbors’ routers.
The 5GHz band delivers significantly faster speeds with less interference, making it ideal for 4K streaming, gaming, and multiple simultaneous streams. The tradeoff is shorter range: 5GHz signal drops off faster as you move away from the router or pass through walls.
For TV streaming specifically, 5GHz is the better choice whenever it is available. Netflix recommends 25 Mbps for 4K content, and a congested 2.4GHz band can struggle to deliver that consistently. If your TV is in the same room as your router or within about 30 feet with minimal obstructions, 5GHz will give you noticeably smoother playback with less buffering.
How to Check If Your TV Supports 5GHz
Before you spend time changing router settings, confirm your TV actually has 5GHz capability. Look up your TV model number (usually found on a sticker on the back or in the settings menu under About or Support) and search for its specifications online.
The key specification to look for is the Wi-Fi standard. If the specs list 802.11a, 802.11ac (Wi-Fi 5), or 802.11ax (Wi-Fi 6), your TV supports 5GHz. If the specs only mention 802.11b/g/n or 802.11n alone, your TV likely only has a 2.4GHz radio.
Here is a quick reference for common TV brands and their typical 5GHz support:
Samsung: Most models from 2019 and newer support 5GHz. Entry-level models from 2018 and earlier may only support 2.4GHz.
LG: webOS TVs from 2019 and newer generally support 5GHz. Budget models may be 2.4GHz only.
Sony: Most mid-range and premium models support 5GHz. Check individual specs for entry-level models.
TCL: Many TCL Android TV models only support 2.4GHz. This is a very common complaint in forums.
Vizio: Most Vizio SmartCast models from 2018 and newer support 5GHz.
If your TV only supports 2.4GHz, no amount of router configuration will change that. You would need an external USB Wi-Fi adapter or a wired Ethernet connection to improve your streaming speeds.
Step-by-Step Troubleshooting Guide
If your TV does support 5GHz but still will not connect, work through these steps in order. Each one addresses a specific cause, and I have arranged them from most likely to least likely based on real-world experience.
Step 1: Verify Your TV’s Wi-Fi Capability
Confirm 5GHz support using the method above. If your TV specs clearly list 802.11ac or 802.11a support, move on to Step 2. If not, your TV is limited to 2.4GHz by hardware design and no router changes will help.
Step 2: Check Router Security Settings (WPA2 vs WPA3)
This is the single most common fix for TVs that suddenly stopped connecting to 5GHz. Log into your router’s admin panel (usually by typing 192.168.1.1 or 192.168.0.1 into a browser) and navigate to the wireless security settings for the 5GHz band.
Look for the security mode setting. If it is set to WPA3-Personal or WPA3 only, change it to WPA2-Personal (AES) or WPA2/WPA3 Mixed Mode. WPA3 is the newer, more secure protocol, but many smart TVs manufactured before 2022 do not support it. After making this change, restart your TV and try connecting again.
Apply the same security setting to both bands if your router uses separate configurations for 2.4GHz and 5GHz. Mixed mode allows newer devices to use WPA3 while your TV falls back to WPA2.
Step 3: Change the 5GHz Wireless Channel
Your router’s 5GHz band may be operating on a channel your TV cannot detect. In your router’s wireless settings, find the channel selection for the 5GHz band. If it is set to Auto, switch it to a specific non-DFS channel.
The safest channels for TV compatibility are 36, 40, 44, and 48. These are non-DFS channels that all 5GHz-capable devices should support. Channels 149, 153, 157, and 161 are also good choices if you are in a region that allows them.
DFS channels (52 through 144) can cause detection problems because some TVs lack DFS certification and simply ignore those frequencies. After changing the channel, save your settings and check whether your TV now sees the 5GHz network.
Step 4: Disable Band Steering on Mesh Systems
If you use a mesh Wi-Fi system like eero, Google Nest Wi-Fi, TP-Link Deco, or Netgear Orbi, band steering may be forcing your TV onto 2.4GHz even when 5GHz is available. These systems combine both bands under a single network name and automatically assign each device to what they consider the best band.
The fix is to either disable band steering in your mesh app or create separate network names (SSIDs) for 2.4GHz and 5GHz. For example, name your 5GHz network “MyNetwork-5G” so you can manually select it on your TV.
In the eero app, this option is called “eero Labs” and may offer a 5GHz preference toggle. In the Google Home app, you can enable separate networks under Wi-Fi settings. TP-Link Deco users can toggle “Smart Connect” off in the Deco app. Once separate networks are active, connect your TV specifically to the 5GHz SSID.
Step 5: Forget and Reconnect the Network
Sometimes the cached network profile on your TV becomes corrupted after a router change. Go to your TV’s network settings, find your Wi-Fi network, and select “Forget network” or “Remove network.” Then search for networks again and enter your password fresh.
This forces the TV to renegotiate the security protocol and channel with your router. It sounds simple, but it resolves the problem in a surprising number of cases, especially after router firmware updates.
Step 6: Move Closer to the Router
5GHz signal has roughly half the range of 2.4GHz. If your TV is two or three rooms away from the router, the 5GHz signal may simply be too weak for a stable connection even though 2.4GHz reaches fine.
Try temporarily moving the TV closer to the router or bringing a phone to the TV’s location to check whether 5GHz signal is strong there. If signal strength is the issue, consider a Wi-Fi extender with 5GHz support or running an Ethernet cable to the TV.
Step 7: Update Router Firmware
Router manufacturers regularly release firmware updates that fix compatibility bugs. Check your router’s admin panel or mobile app for available updates. Some routers update automatically, but others require manual checks.
It is worth noting that firmware updates can also cause problems. If your TV stopped connecting to 5GHz right after a router update, the update may have changed your security mode or channel settings. Follow Steps 2 and 3 to verify and correct any changes.
Brand-Specific Troubleshooting Tips
Different TV brands have unique quirks when it comes to 5GHz Wi-Fi. Based on forum discussions and user reports, here is what to look for by brand.
Samsung TV 5GHz Wi-Fi Problems
Samsung TVs are generally good at 5GHz connectivity, but some models have a region-locking issue. Samsung TVs sold in different regions are configured for different Wi-Fi frequency regulations. If you imported a Samsung TV or bought it from another country, it may be locked to a Wi-Fi region that does not support the 5GHz channels your router uses.
The fix involves accessing the Samsung service menu (not the regular settings menu) and changing the Wi-Fi region code. This requires a specific remote button sequence and carries some risk, so proceed carefully. The region change is a well-documented fix in Samsung community forums for TVs that refuse to detect 5GHz networks.
LG TV (webOS) 5GHz Issues
LG webOS TVs have documented compatibility problems with WPA3 security on the 5GHz band. If your LG TV connects to 2.4GHz but not 5GHz, switching your router from WPA3 to WPA2 on the 5GHz band almost always resolves the issue. LG has addressed this in newer firmware updates, so also check for TV software updates in Settings, then Support, then Software Update.
Sony TV Wi-Fi Troubleshooting
Sony TVs running Android TV or Google TV sometimes fail on 5GHz when Protected Management Frames (PMF) is enabled on the router. PMF is a security feature also known as 802.11w. If your Sony TV will not connect to 5GHz, try disabling PMF on your router’s 5GHz band or setting it to “Optional” rather than “Required.” This setting is usually found in the advanced wireless security section of your router admin panel.
TCL and Android TV Boxes
TCL Roku and Android TV models commonly ship with 2.4GHz-only Wi-Fi chips, especially in their budget lineups. Before troubleshooting, verify your specific TCL model supports 5GHz. If you own an Android TV box (like some Xiaomi Mi Box or Nvidia Shield TV models), most support 5GHz. For those that do, the router security and channel settings covered in Steps 2 through 3 apply directly.
When to Use an External Wi-Fi Adapter
If your TV genuinely lacks 5GHz hardware, you still have options to improve your streaming experience. A USB Wi-Fi adapter that supports 5GHz (802.11ac) can plug directly into your TV’s USB port, assuming the TV supports external adapters.
Samsung and Sony TVs generally work with their own branded adapters. Generic USB Wi-Fi adapters often do not work because most TVs only recognize specific adapter chipsets. Check your TV manufacturer’s website for a list of compatible adapters before buying anything.
An Ethernet cable is the most reliable alternative. A wired connection eliminates Wi-Fi entirely and gives you consistent speeds with zero interference. If your TV is near your router or you can run a cable through walls, Ethernet beats both 2.4GHz and 5GHz Wi-Fi for streaming stability.
A Wi-Fi extender or access point placed halfway between your router and TV can also bridge the gap. Position the extender where it receives a strong 5GHz signal from the router, then connect your TV to the extender via Ethernet for the best results.
Frequently Asked Questions
How to force TV to use 5GHz Wi-Fi?
To force your TV onto 5GHz, log into your router and create separate network names (SSIDs) for the 2.4GHz and 5GHz bands. Name them differently, such as MyNetwork and MyNetwork-5G. Then go to your TV’s Wi-Fi settings, forget the combined network, and connect specifically to the 5GHz SSID. If you use a mesh system, disable band steering or Smart Connect in the mesh app first.
Why is my TV not connecting to 5GHz Wi-Fi?
Your TV may not connect to 5GHz because it only has a 2.4GHz Wi-Fi chip, your router uses WPA3 security that the TV does not support, the router is broadcasting on a DFS channel the TV cannot detect, or a mesh system is steering the TV to 2.4GHz automatically. Check your TV specs first, then verify router security and channel settings.
Why is my 5GHz Wi-Fi not working but 2.4GHz is?
5GHz has a shorter range than 2.4GHz, so distance and walls can weaken the signal enough to prevent connection. Security protocol mismatches (WPA3 on 5GHz but not supported by the device) and DFS channel incompatibility are also common causes. Your device may also only have a 2.4GHz radio with no 5GHz hardware at all.
Should my smart TV be on 2.4GHz or 5GHz?
5GHz is better for TV streaming when available because it delivers faster speeds with less interference, which matters for 4K content. Use 5GHz if your TV is within about 30 feet of the router with minimal walls in between. Use 2.4GHz if your TV is far from the router or separated by multiple walls, since 2.4GHz travels farther.
Can a TV connect to 5GHz Wi-Fi?
Yes, most modern smart TVs from 2019 and newer support 5GHz Wi-Fi. However, many budget models and older TVs only include a 2.4GHz Wi-Fi radio. Check your TV’s specifications for 802.11ac or 802.11a support to confirm 5GHz capability.
Why does my WiFi keep connecting to 2.4 instead of 5?
This is usually caused by band steering, a feature in mesh Wi-Fi systems and some routers that automatically assigns devices to what it considers the best band. Disable band steering or Smart Connect in your router settings and create separate 2.4GHz and 5GHz network names so you can manually choose the 5GHz network.
Conclusion
When your TV connects to 2.4GHz but not 5GHz, the solution almost always comes down to checking three things: your TV’s hardware capability, your router’s security protocol, and your channel or band steering settings. The WPA3 security mismatch is the most common fix, followed closely by DFS channel issues and mesh band steering.
Start by confirming your TV supports 5GHz at the hardware level. Then work through the troubleshooting steps in order, checking router security settings first, then channels, then band steering. Most people resolve this issue within the first two steps.
If your TV truly lacks 5GHz hardware, consider a manufacturer-compatible USB Wi-Fi adapter or a wired Ethernet connection for the most reliable streaming experience. Understanding why your TV 5GHz WiFi connection fails saves you from buying unnecessary equipment and gets you back to watching your shows with minimal downtime.